28343732 has 6 divisors (see below), whose sum is σ = 49601538. Its totient is φ = 14171864.

The previous prime is 28343729. The next prime is 28343767. The reversal of 28343732 is 23734382.

It can be written as a sum of positive squares in only one way, i.e., 28153636 + 190096 = 5306^2 + 436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3542963 + ... + 3542970.

It is an arithmetic number, because the mean of its divisors is an integer number (8266923).

Almost surely, 2^28343732 is an apocalyptic number.

It is an amenable number.

28343732 is a deficient number, since it is larger than the sum of its proper divisors (21257806).

28343732 is a wasteful number, since it uses less digits than its factorization.

28343732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085937 (or 7085935 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The square root of 28343732 is about 5323.8831692666. The cubic root of 28343732 is about 304.8964335279.

The spelling of 28343732 in words is "twenty-eight million, three hundred forty-three thousand, seven hundred thirty-two".